1. First of all, let's see if the products of different categories mentioned are similar to some extent (based on consumers' cognition). For example, the categories of 30 and 3 1 are food, and ordinary consumers will not tell whether the food they want to consume belongs to 30 or 3 1. In this case, if someone else has registered a trademark in category 30, you can directly get category 3 1. However, the owner of Class 30 trademark can apply to reject your trademark application by way of objection, provided that his trademark registered in Class 30 has a high reputation (this determination mainly depends on whether he can find strong evidence to prove it).

2. See if the previously registered trademark is already a well-known trademark in China. If so, others may not register it in any category. The protection of some provincial famous trademarks may also cross categories, but it is limited to similar products.

3. You can apply for copyright registration as long as it is your original work, regardless of words, sentences and patterns. Although the effect is not strong, the scope of victory is large enough to protect against complete plagiarism.

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